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fix: unnecessary YAML Config reloads #9065

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boekkooi-lengoo
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Description

In order to avoid unnecessary reloading of the yaml configuration. The time used to detect the last change to the config file is changed from change which is the time of the last file status change to the modification time wich is the time of the last data modification.

For more information also checkout http://lunarmodules.github.io/luafilesystem/manual.html#reference and https://linux.die.net/man/2/stat

Fixes: #9051

Checklist

  • I have explained the need for this PR and the problem it solves
  • I have explained the changes or the new features added to this PR
  • I have added tests corresponding to this change
  • I have updated the documentation to reflect this change
  • I have verified that this change is backward compatible (If not, please discuss on the APISIX mailing list first)

@boekkooi-lengoo boekkooi-lengoo changed the title Use mtime instead of ctime YAML Config - Use mtime instead of ctime Mar 14, 2023
@boekkooi-lengoo boekkooi-lengoo changed the title YAML Config - Use mtime instead of ctime fix: unnecessary YAML Config reloads Mar 14, 2023
@monkeyDluffy6017
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Test cases is needed, you could follow this: https://github.com/apache/apisix/blob/master/t/config-center-yaml/plugin.t

@boekkooi-lengoo
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Hey @monkeyDluffy6017,
What type of test case should I add?
I'm not sure how to best reproduce the issue in a test using lua.

On a related not after reading https://apenwarr.ca/log/20181113 I'm thinking that we should add inode and size to the version as well. What do you think?

@monkeyDluffy6017
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hi @boekkooi-lengoo, try to follow the following test cases:
https://github.com/apache/apisix/blob/master/t/cli/test_standalone.sh

@shreemaan-abhishek
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ping @boekkooi-lengoo

Show how a reload is triggered when it's not needed.
In order to avoid unnecessary reloading of the yaml configuration. The time used to detect the last change to the config file is changed from `change` which is the time of the last file status change to the `modification` time wich is the time of the last data modification.

For more information also checkou http://lunarmodules.github.io/luafilesystem/manual.html#reference and https://linux.die.net/man/2/stat

Fixes: apache#9051
@boekkooi-lengoo
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@shreemaan-abhishek 🏓

@monkeyDluffy6017
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please merge the master

@boekkooi-lengoo
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@monkeyDluffy6017 Created merge commit 684c78d as requested

@monkeyDluffy6017 monkeyDluffy6017 merged commit bfb9a98 into apache:master Jan 12, 2024
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@boekkooi-lengoo boekkooi-lengoo deleted the avoid-unnecessary-reloads branch January 12, 2024 06:59
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help request: Lots of load(): new plugins logs
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